package com.example.forum.controller;

import com.example.forum.common.AppResult;
import com.example.forum.common.ResultCode;
import com.example.forum.config.AppConfig;
import com.example.forum.model.Message;
import com.example.forum.model.User;
import com.example.forum.services.IMessageService;
import com.example.forum.services.IUserService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.List;

@Slf4j
@Api(tags = "站内信接口")
@RestController
@RequestMapping("/message")
public class MessageController {
    @Resource
    private IMessageService messageService;
    @Resource
    private IUserService userService;
    @ApiOperation("发送站内信")
    @PostMapping("/send")
    public AppResult send(HttpServletRequest request,
                          @ApiParam("接收者ID")@RequestParam("receiveUserId")@NonNull Long receiveUserId,
                          @ApiParam("内容")@RequestParam("content")@NonNull String content){
        //获取当前登录的用户信息
        HttpSession session=request.getSession(false);
        User user=(User) session.getAttribute(AppConfig.USER_SESSION);
        //当前登录用户的状态，如果是禁言状态不能发站内信
        if(user.getState()==1){
            // 返回用户状态异常
            return AppResult.failed(ResultCode.FAILED_USER_BANNED);
        }
        //不能给自己发送
        if(user.getId()==receiveUserId){
            return AppResult.failed("不能给自己发送站内信");
        }
        //校验接收者是否存在
        User receiveUser=userService.selectById(receiveUserId);
        if(receiveUser==null||receiveUser.getDeleteState()==1){
            //返回接收者状态异常
            return AppResult.failed("接收者状态异常");
        }
        //封装对象
        Message message = new Message();
        message.setPostUserId(user.getId()); // 发送者Id
        message.setReceiveUserId(receiveUserId); // 接收者Id
        message.setContent(content); // 站内信的内容
        // 5. 调用Service
        messageService.create(message);
        // 6. 返回结果
        return AppResult.success("发送成功");
    }

    @ApiOperation("获取未读数")
    @GetMapping("/getUnreadCount")
    public AppResult<Integer> getUnreadCount (HttpServletRequest request) {
        // 1. 获取当前登录的用户
        HttpSession session = request.getSession(false);
        User user = (User) session.getAttribute(AppConfig.USER_SESSION);
        // 2. 调用Service
        Integer count = messageService.selectUnreadCount(user.getId());// 当前登录用户的Id就是接收者Id
        // 3. 返回结果
        return AppResult.success(count);
    }

    @ApiOperation("查询用户的所有站内信")
    @GetMapping("/getAll")
    public AppResult getAll(HttpServletRequest request){
        //获取当前登录的用户
        HttpSession session=request.getSession(false);
        User user=(User) session.getAttribute(AppConfig.USER_SESSION);
        //调用Service
        List<Message>messages=messageService.selectByReceiveUserId(user.getId());
        return AppResult.success(messages);
    }
    @ApiOperation("更新为已读")
    @PostMapping("/markRead")
    public AppResult markRead(HttpServletRequest request,
                              @ApiParam("站内信ID")@RequestParam("id")@NonNull Long id){
        //根据Id查询站内信
        Message message=messageService.selectById(id);
        if (message == null || message.getDeleteState() == 1) {
            // 返回错误信息
            return AppResult.failed(ResultCode.FAILED_MESSAGE_NOT_EXISTS);
        }
        //站内信是不是自己的
        HttpSession session=request.getSession(false);
        User user=(User) session.getAttribute(AppConfig.USER_SESSION);
        if(user.getId()!=message.getReceiveUserId()){
            //返回错误信息
            return AppResult.failed(ResultCode.FAILED_FORBIDDEN);
        }
        //调用Service
        messageService.updateStateById(id,(byte)1);
        //返回结果
        return AppResult.success();
    }
    /**
     * 回复站内信
     * @param repliedId 要回复的站内信Id
     * @param content 站内信的内容
     * @return AppResult
     */
    @ApiOperation("回复站内信")
    @PostMapping("/reply")
    public AppResult reply(HttpServletRequest request,
                           @ApiParam("要回复的站内信Id")@RequestParam("repliedId")@NonNull Long repliedId,
                           @ApiParam("站内信的内容") @RequestParam("content") @NonNull String content){
        //检验当前登录的用户状态
        HttpSession session=request.getSession(false);
        User user=(User) session.getAttribute(AppConfig.USER_SESSION);
        if(user.getState()==1){
            // 返回错误描述
            return AppResult.failed(ResultCode.FAILED_USER_BANNED);
        }
        //检验要恢复的站内信状态
        Message existsMessage=messageService.selectById(repliedId);
        if(existsMessage==null||existsMessage.getDeleteState()==1){
            // 返回错误描述
            return AppResult.failed(ResultCode.FAILED_MESSAGE_NOT_EXISTS);
        }
        //不能给自己回复
        if(user.getId()==existsMessage.getPostUserId()){
            // 返回错误描述
            return AppResult.failed("不能回复自己的站内信");
        }
        //构造对象
        Message message=new Message();
        message.setPostUserId(user.getId());
        message.setReceiveUserId(existsMessage.getPostUserId());
        message.setContent(content);
        messageService.reply(repliedId,message);
        //返回成功
        return  AppResult.success();
    }
}
